{
  "manageEntity": {
    "action": "Save",
    "entityId": "853915198",
    "entityType": "Track",
    "nonce": "0x034a42be592f0cf09ec1136a83a34629f45b8198ca54e21bca2efb0b4b22ba91",
    "signature": "0x7ccfb760c4d3b0ffe7c110c3c12fcb12501487bc0d1ae151150931080226ea8517119cd7e7d4e34ffbac48a445853a7930b5c2b50b443586ec26c777c6a360a31b",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}